Q. 19

Which of the following is true about the charge acquired by p-type semiconductors?
A. positive

B. neutral

C. negative

D. depends on concentration of p impurity

Answer :

P-type semiconductors itself have positive charge carriers (holes) which are relatively free to move from one site to another (although the holes do not move actually , it is the electrons that move to holes and create a new hole in its original position).


But at last it is neutral because there are fixed acceptors ( atoms ) who accept the electrons and become negative ; therefore a neutrality is worked out between the holes (positively charged) and the accepting atoms (negatively charged).



Hence, options (i) , (iii) , (iv) are in correct.

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